Blacksmith&#39;s forging-hammer.



N0.724,294. PATBNTBD MAR.s1,`19os.

o. JEWELL.

BLACKSMITHS FORGING HAMMER* APPLICATION FILED JULY s, 1902.

No MODEL.

@gw-aww Nirnn STATES ATENT FFCE.

CORNELIUS JEWELL, 0F WALLED LAKE, MICHIGAN, ASSIGNOR TO JAMES M. HOYT,OF WALLED LAKE, MICHIGAN.

BLACKSMITHS FORGING-HAMMR.

SPECIFICATION forming part of Letters Patent No. 724,294, dated March31, 1903.

Application filed July 8,1902. Serial No. 114,823. (No model.)

To all whom it may concern.-

Beit known that I, CORNELIUS JEWELL, a citizen of the United States,residing at Walled Lake, in the county of Oakland and State of Michigan,have invented new and useful Improvements in vBlacksmithsForging-Hammers, of which the following is a specification. Y

This invention relates to a foot. or blacksmiths forging-hammer; and theobject of the same is to provide'a mechanical striker for blacksmithsuse adapted to be operated by the foot and embodying a Sledge-hammer toreplace the ordinary blacksmiths helper and arranged to strike quicklight blows or slow heavy ones at the will of the operator and embodyingadjusting means whereby the sledgehammer may be caused to engage withdifferent portions of an anvil with which it cooperates. Y

The invention consists in the construction and arrangement of theseveral parts, which will be more fully hereinafter described andclaimed. v

In the drawings, Figure l is a perspective view of a foot-hammerembodying the features of the invention. Fig. 2 is a section on the line2 2, Fig. 1, showing a fulcrum or pivot connection for thehammer-support.

Similar numerals of reference are employed to indicate correspondingparts in both views.

The numeral 1 designates a bed-plate having an anvil-block 2 risingfromone end thereof, Von which is disposed ari-*ordinary anvil 3. Nearthe opposite end of the bed-plate 1 a fulcrum-bar 4 is disposed thereonand has the under portion adjacent to the side edges cut away to formupwardly-curved bevels 5. On the fulcrum-bar 4 is a securing-plate 6,from which rises a standard 7, and passing centrally through the plate 6and bar 4 and also through the bed-plate l beneath is a fulcrum orpivot-bolt 8, having a nut 9 on the upper end thereof bearing againstthe plate 6. Through the lnediu'm'ofthis fulcrum or pivot-bolt 8 thefulcrum-bar, the plate 6 secured thereto, and the standard 7 are adaptedas a whole to be turned upon the pivotbolt 8 in opposite directions onthe bed-plate l, the pivotal connection being loose enough to permit-thefulcrum-bar and plate 6, as well pivot-bolt 8. The fulcrum-bar and plate6 are firmly secured to each other and with the standard are adapted tobe moved in opposite directions over the surface of the bed-plate 1 inaccordance with the adjustment of the Sledge in relation to the anvil 3.

The standard 7 comprises opposite upright ,bars 10, which are spacedapart from each other and have their lower extremities 1l laterallydeflected and terminating in lower angular feet 12, which rest flatagainst the upper surface of the securing-plate 6 and are vattached tothe latter and to the bar by means of bolts and nuts 13. Between theupper ends of the bars 10 a helve bar 14 is pivotally mounted and hasahead 15 secured on the upper end thereof, the said helve-bar and headforming a Sledge-hammer of the usual pattern employed by blacksmiths orothers for forging purposes. The lower end of the belve-bar 14 extendsbelow the pivotal connection for `said bar and has the upper end of aretractile spring 16 secured thereto, said spring passing downwardlybetween the upright bars 10 and secured at a lower point to a cross pinor bolt 17 engaging the said bar 10. The spring 16 is strong enough tocause the Sledge-hammer which it controls to return to normal uprightposition, as shown by Fig. 1, when the operating pressure on theremaining elements of the organization has been relieved therefrom.

At a point slightly above the outwardly defiected or bent extremities 11of the upright bars 10 the rear yoked end 18 of a treadle 19 ispivotally attached to the said upright bars, the treadle-bar being bentat an angle, as at 20, to project it laterally for free verticalreciprocatioan adjacent-to one end ofthe anvilblock 2. This treadle hasa forwardly-pro- -jecting member 21, which passes beyond the anvil-blockat onD side thereof and terminates in a front enlarged foot-receivingmember 22,

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having its upper surface slightly roughened for obvious reasons. Abovethe point of attachment of the treadle 19 to the standard a pull-bar 23is pivotally mounted at its rear endt between the upright bars 10 and isconnected at an intermediate point by a looselyattached link-rod 24 tothe said treadle in rear of the angular or lateral bend of the latter,the forward end of the pull-bar 23 being also connected by a looselink-bar 25 to the helvebar 14. Between the points of attachment of therear ends of the treadle 19 and the pullbar 23 to the standard the rearyoked end 26 of an adjusting-bar 27 is also pivotally connected to theupright bars 10 and has its front free end in adjustable engagement witha retainer 2S, secured to the upper portion of the rear side of theanvil-block 2 and formed with a plurality of notches 29 in the upperedge thereof. To hold the adjusting-bar 27 downwardly in normal positionand prevent it from becoming disengaged from the retainer 28, a spring30 is secured thereto and to the standard at a point in the latter belowthe point of attachment of the rear end of said adjusting-bar.

In actuating the Sledge-hammer the operator while standing in front ofthe anvil-block 2 and anvil 3 places his foot on the front freeextremity of the treadle and presses downwardly on the latter. Thisdownward pressure exerts a pull through the link-rod 24 on the pull-bar23, and in view of the connection between the pull-bar and the helve-barthe Sledge-hammer is forcefully drawn downward and caused to strike theanvil 3, the force with which the sledge 15 strikes the anvil beingregulated by the downward pressure imparted to the treadle 19. TheSledge-hammer is moved downwardly against the resistance ofthe spring16, and a relaxation of the pressure on the treadle will permit the saidspring to operate and throw the Sledge-hammer upwardly, as shown, and atthe same time raise the treadle for further depression. This operationcan be rapidly carried on in succession as long as it is desired to usethe forging pressure of the Sledge-hammer. When it is required that thepoint at which the Sledgehammer shall strike the anvil shall be changed,the adjusting bar 27 is raised against the resistance of the spring 30,and the standard 7, together with the bar 4 and plate 6, arecorrespondingly turned or swung around on the fulcrum or pivot-bolt 8,and the said bar 27 is then permitted to enter another one of thenotches 29. It is obvious that the notches can be increased in numberand thereby vary the degree of adjustment of the device to increase itsrange of operation in relation to an anvil or other analogous device.

The pull-bar 23 is an efficient auxiliary in the organization ofelements set forth in view of the fact that the belve-bar 14, to whichit is attached, is opera-ted in a positive manner and is permitted tohave greater freedom iu contradistinction to the operation that wouldresult if a direct rigid or even a link connection existed between thetreadle 19 and the said bar 14. The use of the pull-bar 23, between andconnected to the helve-bar 14 and treadle 19 by the links 24 and 25,also imparts greater power to the downward throw of the belve-bar andthe hammer-head thereon toward the anvil, and, moreover, the connectionsset forth between the leverand helvebar permit the latter to be moresensitively controlled in its approach toward the anvil. Furthermore,the strain on the several coperating parts, including the treadle andthe helve-bar, is materially reduced when said parts return to normalposition through the action of the spring 16.

The improved hammer has been shown applied in connection with an anvil;but it will be understood that it may be equally well used with otherdevices. Furthermore, changes in the proportions, dimensions, and minordetails may be resorted to without inthe least departing from thespiritof the invention.

I-Iaving thus fully described the invention, what is claimed as newis- 1. In a hammer of the class set forth, the combination with asupport having means thereon for holding work, of a retainer secured tosaid support, a vertically-disposed pivotally-mounted standard, a hammermovably mounted in the upper portion of the said standard, a pull-barpivotally mounted in the standard, a treadle pivoted to the standard, alink loosely attached to the pull-bar and hammer-helve, a link looselyconnected to the treadle and pull-bar, and an adjusting-bar alsopivotally connected to the standard and movably engaging the retainer,the hammer and adjusting device having springs attached thereto.

2. In a hammer of the class set forth, the combination with a basesupport having means disposed thereon for holding work, an uprighthavinga lower fulcrum-bar secured thereto and formed with oppositeupwardlycurved bevels at the under portion ofthe sides thereof, a singleconnecting device between the support and the fulcrum-bar and a part ofthe upright secured to said fulcrum-bar, a retainer pivotally secured tothe upright and adjustable in relation to a portion of the workholdingmeans, a hammer movably mounted in the said upright, a treadle connectedto the hammer to throw it downwardly against the means for holding thework, and means for returning the hammer and treadle to normal position.

In testimony whereof I affix my signature in presence of two witnesses.

CORNELIUS JE'W ELL.`

lVitnesses:

A. M. VAN TAssEL, .TENNIE GILoHREs'r.

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